hg: shenandoah/jdk: Test failures after "Reinstate single-threaded reference processing"

[shade at redhat.com]

Changeset: 18a21d8218b6
Author:    shade
Date:      2018-10-17 09:16 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/18a21d8218b6

Test failures after "Reinstate single-threaded reference processing"

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.cpp